/*
  Copyright 2011 fullkawa

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 */
package jp.fullkawa.xnovel;

import jp.fullkawa.xnovel.picture.Picture;

public class Layer implements Continuous
{
	private String layerId;
	private Picture picture;

	public Layer(String layer_id)
	{
		this.layerId = layer_id;
	}

	public String getLayerId() {
		return layerId;
	}

	public Picture getPicture() {
		return picture;
	}

	public void setPicture(Picture picture)
	{
		this.picture = picture;
		if (picture != null && picture instanceof Layerable)
		{
			((Layerable) picture).setLayerId(this.layerId);
		}
	}

	public boolean isChange()
	{
		Picture picture = this.getPicture();

		if (picture == null)
		{
			return false;
		}
		return picture.isChange();
	}

	public void setChange(boolean change)
	{
		Picture picture = this.getPicture();

		if (picture != null)
		{
			picture.setChange(change);
		}
	}

	@Override
	public Layer clone()
	{
		Layer clone = null;
		try {
			clone = (Layer)super.clone();
			if (this.picture != null)
			{
				clone.setPicture(this.picture.clone());
			}

		} catch (CloneNotSupportedException e) {
			e.printStackTrace();
		}
		return clone;
	}
}
